package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 添加员工/service层
     * @param dto
     */

    @Override
    public void addEmp(EmployeeDTO dto) {
        Employee employee=new Employee();
        //属性拷贝:属性名和类型一致
        BeanUtils.copyProperties(dto,employee);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);

        employeeMapper.insert(employee);
    }

    /**
     * 员工管理分页-service层
     * @param dto
     * @return
     */
    @Override
    public PageResult getPage(EmployeePageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(),dto.getPageSize());
        List list=employeeMapper.list(dto);
        Page page=(Page) list;
        return new PageResult(page.getTotal(),page.getResult());



    }

    /**
     * 更新管理员账号状态
     * @param status
     * @param id
     */

    @Override
    public void updateStatus(Integer status, Long id) {
        Employee emp=Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                        .build();

        employeeMapper.updateStatus(emp);
    }

    /**
     * 根据id获取单员工
     * @param id
     * @return
     */

    @Override
    public Employee getEmpById(Long id) {
        return employeeMapper.getById(id);
    }

/**
 * 更新员工信息的方法
 * 该方法用于更新系统中已存在的员工信息
 *
 * @param dto 员工数据传输对象，包含需要更新的员工信息
 */
    @Override
    public void updateEmp(EmployeeDTO dto) {

        Employee employee=new Employee();
        BeanUtils.copyProperties(dto,employee);
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    @Override
    public void updatePassword(PasswordEditDTO dto) {
        Employee emp = employeeMapper.getById(dto.getEmpId());
        String s=DigestUtils.md5DigestAsHex(dto.getOldPassword().getBytes());
            if(emp!=null&&emp.getPassword().equals(s)){
                emp.setPassword(DigestUtils.md5DigestAsHex(dto.getNewPassword().getBytes()));
                emp.setUpdateTime(LocalDateTime.now());
                emp.setUpdateUser(BaseContext.getCurrentId());
                employeeMapper.update(emp);
                return;
            }
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);


    }


}
